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Andy Coghlan

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Illustration of three different kinds of brain cell

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Mysterious dark brain cells linked to Alzheimer鈥檚 and stress

A tangle of tau protein inside a nerve cell from someone who has Alzheimer's disease

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Alzheimer鈥檚 drug that failed trial may still slow disease

Humans

Revealed: the teenage brain upgrades that occur before adulthood

People wearing "HIV positive" T-shirts, holding up a banner bearing the words "HIV/AIDS"

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Huge boom in teen HIV cases could cause epidemic to spiral

Pseudomonas aeruginosa under the electron microscope

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Lung bacteria’s sense of touch tells them when to turn nasty

Life

Meet the philosopher ducklings that indulge in abstract thought

A woman sleeping with a shaft of light falling on her

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Too much light weakens bones and changes immune system

Humans

The musical harmonies you like depend on where you’re from

Palm of hand holding pills

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Setbacks force HIV researchers to focus on remission, not cures

Incan mummies on display

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Antibiotic resistance discovered in the guts of ancient mummies

People walking on giant map of a city, with plenty of giant multicoloured pins marking important places

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Memories of favourite locations have a special place in brain

Environment

Bears turn into couch potatoes thanks to fast food binges